Consolidated Statements of Stockholders' Equity (Deficit) - USD ($) shares in Thousands, $ in Thousands	Total	Common Stock	Additional Paid-in Capital	Deferred Stock Units	Retained Earnings	Accumulated Other Comprehensive Loss	Treasury Stock	Noncontrolling Interest
Balance (in shares) at Dec. 31, 2016		103,341
Balance beginning of period at Dec. 31, 2016	$ (108,213)	$ 10,334	$ 1,011,895	$ 5,514	$ 540,401	$ (43,053)	$ (1,633,443)	$ 139
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	263,269				263,144			125
Other comprehensive income, net	6,583					6,583
Repurchases of common stock, net	(278,085)						(278,085)
Common stock issued under stock plans, net (in shares)		934
Common stock issued under stock plans, net	39,099	$ 94	39,005
Deferred stock units activity	(12)		(350)	338
Share-based compensation cost	23,517		23,381	136
Balance (in shares) at Dec. 31, 2017		104,275
Balance end of period at Dec. 31, 2017	(53,842)	$ 10,428	1,073,931	5,988	803,545	(36,470)	(1,911,528)	264
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	377,047				377,031			16
Other comprehensive income, net	(5,321)					(5,321)
Repurchases of common stock, net	(377,371)						(377,371)
Common stock issued under stock plans, net (in shares)		812
Common stock issued under stock plans, net	37,745	$ 81	39,756	(2,092)
Deferred stock units activity	0		(385)	385
Share-based compensation cost	$ 25,157		24,914	243
Balance (in shares) at Dec. 31, 2018	105,087	105,087
Balance end of period at Dec. 31, 2018	$ (9,233)	$ 10,509	1,138,216	4,524	1,167,928	(41,791)	(2,288,899)	280
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income	427,792				427,720			72
Other comprehensive income, net	(4,391)					(4,391)
Repurchases of common stock, net	(311,644)						(311,644)
Common stock issued under stock plans, net (in shares)		624
Common stock issued under stock plans, net	36,023	$ 62	36,551	(590)
Deferred stock units activity	0		(324)	324
Share-based compensation cost	$ 39,278		39,074	204
Balance (in shares) at Dec. 31, 2019	105,711	105,711
Balance end of period at Dec. 31, 2019	$ 177,825	$ 10,571	$ 1,213,517	$ 4,462	$ 1,595,648	$ (46,182)	$ (2,600,543)	$ 352